A Finite Volume Based Fully Nonlinear Potential Flow Model for Water Wave Problems

A new Fully Nonlinear Potential Flow (FNPF) numerical model has been developed for the simulation of nonlinear water wave problems. At each time step, mixed boundary value problem flow field is spatially discretised by Finite Volume Method (FVM) and kinematic dynamic free surface conditions are defined in a semi-Eulerian-Lagrangian form, which used to update elevation velocity potential on surface. In model, waves generated through relaxation zone absorbed an artificial damping at inlet outlet tank (NWT), respectively. Instead five-point smoothing technique, more versatile fourth-order technique eliminate possible saw-tooth instability Test cases with increasing complexities, such as generation absorption, 2- 3-Dimensional shoaling, wave-cylinder interaction simulated assess its accuracy, convergence, robustness. For all considered, satisfactory agreements wave-induced forces against experimental measurements other existing results achieved. The fully utilises functionalities OpenFOAM provide effective alternative FNPF based models constructing hybrid coupling multiphase OpenFOAM.